package java1224;

public class Java01 {
    public static void main(String[] args) {
        /* int a = 2;
 System.out.println(a);
 a = 3;
 a = 5;
 a = 7;
 System.out.println(a);*/
        //常量：不能更改、用final关键字修饰
        final int b = 6;
        int salary = 1_000_000_000;
    }
}
